class Settings():
        def __init__(self):
                self.screen_width=1000
                self.screen_height=700
                self.bg_color=(230,230,230)
                self.ship_speed_factor =1.5


                #炮弹设置
                self.bullet_speed_factor = 1
                self.bullet_width = 3
                self.bullet_height = 15
                self.bullet_color =(60, 60, 60)
                self.bullets_allowed = 30
                #diren设置
                self.badball_speed_factor = 1
                self.fleet_drop_speed = 8
                self.fleet_direction = 1
                self.myball_limit = 3
